Multiple firing coherence resonances in excitatory and inhibitory coupled neurons |
| |
Authors: | Qingyun Wang Honghui Zhang Matjaž Perc Guanrong Chen |
| |
Institution: | 1. School of Natural and Applied Science, Northwestern Polytechnical University, Xi’an, Shaanxi, 710072, China;2. Department of Mathematics, The University of Texas at Arlington, Texas, 76019, USA;3. Department of Dynamics and Control, Beihang University, Beijing, 100191, China;4. Department of Neurology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas, 75390, USA;1. College of Science, China University of Mining and Technology, Xuzhou 221116, China;2. Department of Physics, Lanzhou University of Technology, Lanzhou 730050, China |
| |
Abstract: | The impact of inhibitory and excitatory synapses in delay-coupled Hodgkin–Huxley neurons that are driven by noise is studied. If both synaptic types are used for coupling, appropriately tuned delays in the inhibition feedback induce multiple firing coherence resonances at sufficiently strong coupling strengths, thus giving rise to tongues of coherency in the corresponding delay-strength parameter plane. If only inhibitory synapses are used, however, appropriately tuned delays also give rise to multiresonant responses, yet the successive delays warranting an optimal coherence of excitations obey different relations with regards to the inherent time scales of neuronal dynamics. This leads to denser coherence resonance patterns in the delay-strength parameter plane. The robustness of these findings to the introduction of delay in the excitatory feedback, to noise, and to the number of coupled neurons is examined. Mechanisms underlying our observations are revealed, and it is suggested that the regularity of spiking across neuronal networks can be optimized in an unexpectedly rich variety of ways, depending on the type of coupling and the duration of delays. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|